If a gasoline engine has an efficiency of 21 percent and losses 780 j to the cooling system and exhaust during each cycle, how much work is done by the engine?

What are the theoretical properties of a gas at a temperature of 0 kelvin?

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Arigid tank is divided into two equal parts by a partition. one part of the tank contains 3 kg of compressed liquid water at 400 kpa and 60°c while the other part is evacuated. the partition is now removed, and the water expands to fill the entire tank. determine the entropy change of water during this process, if the final pressure in the tank is 40 kpa. use steam tables.